<!DOCTYPE html>
<html lang="en" style="height: 100%">
<head>
    <meta charset="UTF-8">
    <title>demo01.html</title>
</head>
<body style="height: 100%">
    <iframe src="https://www.tmall.com/" name="pageBox" frameborder="1" height="100%" width="100%"></iframe>

</body>
</html>